1898.] COBAIS ntOM THE SOTTTH PACIFIC. 



527 



3. TuNGiA OEASSiTBNTACULATA Quoy and Graimard. 



Func/ia crassitentaculata, Quoy and Gaimard, Voy. de I'Astrol., 

 Zool. t. iv. p. 182. 



Fungia crassitentaculata, Edwards and Haime, Cor. iii. p. 19. 



I have with some hesitation referred one specimen, 13 cm. in 

 diameter, to this species as it corresponds fairly well with the 

 descriptions and two named specimens — one in spirit — in the 

 British Museum. 



Rotuma; boat-chaunel. 



4. Fungia dentigeea Leuckart. 



Funffia dentigera, Leuckart, De Zooph. Corall. p. 48, tab. iii. 

 figs. 1, 2. 



Fungia deniigem, Dana, Zooph. p. 301, pi. xviii. fig. 4. 



Fungia dentigera, Edwards and Haime, Cor. iii. p. 17. 



There is one specimen of this species, 13 cm. long by 7 cm. 

 broad, which closely corresponds to Dana's figure and description. 

 The margin, too, has the same obsolescent folds. 



Eotuma; boat-channel. 



5. Fungia danje Edwards and Haime. 



Fungia ecliinata, Dana, Zooph. p. 294, pi. xviii. figs. 8, 9. 



Fungia dance, Edwards and Haime, Ann. des Sci. Nat. t. xv. 

 p. 80 (1851). 



Fungia danai, Edwards and Haime, Cor. iii. p. 11. 



There is one specimen of this species, about 12 cm. in diameter, 

 which seems to be to some extent intei-mediate between Dana's 

 Fijian and East-Indian specimens. The large radiating lamellae of 

 the under surface are at the edge of the corall um about 1*2 cm. 

 apart and correspond to the first four cycles of septa ; in places 

 the lamellae of the fifth cycle are nearly as large, while those of the 

 sixth to the eighth can usually be distinguished running inwards for 

 1-2 cm. On the upper surface the septa are less strongly and more 

 regularly toothed than in either of Dana's specimens. At the 

 inner ends of those septa, which do not reach the axial fossa, there 

 is generally a low but distinct tooth, about 3 mm. broad. 



Eotuma ; boat-channel. 



Genus Halomitea. 



Ilalomitra, Dana, Zooph. p. 311 (1846). 



Halomitra, Duncan, Journ. Linn. Soc, Zool. xviii. p. 144. 



Halomitra, and Podahacia Quelch, Challenger Reef-Corals, 

 pp. 138-141. 



The characters by which Quelch separated Podahacia and 

 Halomitra are, I consider, mainly due to the age and mode of 

 growth of the specimens which he examined and of those which 

 had been previously described. 



The free corallum seems from my specimens (2) to have been 

 formed in a somewhat similar manner to that of the genus Fungia, 

 b}' the breaking off of discs from an attached stock. At first there 



35* 



